From: khaines@...
Date: 2007-01-12T23:13:50+09:00
Subject: Re: Garbage collection and Arrays

On Fri, 12 Jan 2007, Aaron Patterson wrote:

> Hi, I seem to be running in to some garbage collection weirdness.
> Hopefully someone will have some insight for me....  My sample script
> seems to leak Strings when I use shift on an Array, but not pop:
>
> array = []
> 10.times { array << "foo" }
> 10.times { array.pop }  # Change this to shift to see a leak
>
> o_count = Hash.new(0)
> GC.start
> ObjectSpace.each_object { |o| o_count[o.class] += 1 }
>
> o_count.sort_by { |k,v| -v}.each { |k,v| puts "#{k}: #{v}" }
>
> Is this a bug?  Or is there something I'm missing?  Thanks!

Check the archives of the list for extensive discussion.  The upshot is 
that it's a problem with this shift() method.


Kirk Haines